Fused Zirconium Mullite Bricks – Premium Electrocast Refractory Bricks for Heavy-Duty High-Temperature Kiln Lining

Fused Zirconium Mullite Bricks are high-end electrofused refractory materials manufactured by melting high-purity alumina raw materials and zircon sand under ultra-high temperature followed by casting forming. The product perfectly integrates the excellent properties of mullite and zirconia. The zirconia component delivers phase transformation toughening effect, which significantly boosts thermal shock resistance and anti-corrosion performance. Designed for severe high-temperature service environments, this refractory brick is a reliable lining solution for a wide range of industrial kilns that face frequent temperature fluctuations and chemical erosion.

Fused Zirconium Mullite Bricks feature dense, uniform crystalline microstructure with low apparent porosity and high bulk density. The bricks maintain superior mechanical strength even under continuous high-temperature conditions and show great wear resistance. Remarkable thermal shock resistance allows the bricks to withstand rapid and repeated temperature cycling without crack generation or surface spalling. They exhibit strong resistance against erosion from molten glass, alkaline slag and alkali vapors, with low thermal expansion rate and stable volume during long-term high-temperature operation. Custom dimensions and special precast shapes can be fabricated strictly in accordance with customer technical drawings and site requirements.

Fused Zirconium Mullite Bricks are extensively used in glass melting furnaces, ceramic roller kilns, metallurgical walking beam heating furnaces and high-temperature hazardous waste incinerators. Typical installation positions include furnace crowns, burner blocks, skid rails, feeding channels and other areas suffering severe combined erosion and thermal stress. Adoption of these bricks can greatly extend the service life of kiln lining and reduce unexpected shutdown loss and maintenance costs.

We implement strict quality control throughout raw material screening and the whole manufacturing process. Complete batch test reports and ISO certification are available for every shipment. We are capable of customizing chemical composition, brick sizes and precision machining based on clients’ actual kiln working conditions and drawings. Pre-production samples can be supplied for laboratory performance evaluation before bulk orders. Export shipments use fumigated solid wooden pallets to guarantee safe long-distance ocean transportation.

Al₂O₃ ≥73%

ZrO₂ ≥5.5%

Bulk Density ≥3.2 g/cm³

Cold Crushing Strength ≥250 MPa

Refractoriness >1750℃

Please send us your kiln working parameters and drawing requirements. Our technical team will provide professional refractory lining solutions and competitive quotations promptly.